Insert a brush attachment onto your vacuum cleaner. Run the vacuum cleaner over the stains on the rice paper, gently loosening them.
Grab a wad of artist's eraser approximately half the size of the stain you're trying to remove. Press and rub the artist's eraser back and forth very gently against the stain.
Turn and fold the artist's eraser as you work so that the stain is constantly in contact with a fresh part of the artist's eraser. Don't exert a lot of pressure on the rice paper as you don't want it to tear. Be gentle as you work, pressing and rubbing. Continue until the stains vanish.
Remove the brush attachment from your vacuum and run the vacuum's hose over the rice paper, sucking up the dust and loose particles from the artist's eraser.